Large set of erasable pens perfect for learning to write, for office, home and school. The set consists of 12 elements: 1x erasable pen 10 x replaceable cartridges 1 x eraser kolor random Kolor of ink in pen: blue Refills for erasable pens are filled with thermolabile ink. This means that it will be visible at room temperatures, but heating or freezing the saved card will make the inscription disappear The erasable pen can be written in one place and erased as many times as the paper strength allows Ink in erasable pen refills wears out much faster than in regular pens, so if you write really a lot, we suggest stocking up on spare refills as well The cartridges we offer do not fit Pilot pens Are our pens right for you? YES - if you often take notes that need correction YES - if you make a daily to-do list and cross out the ones you do YES - if you write down numbers at work that sometimes need to be corrected YES - if your child is learning to write and you want to make it easier for him to correct mistakes YES - if you arrange clients for specific meeting hours and you are tired of crossing out names in the schedule When is it not a good idea to use erasable pens? NOT - if you fill out important official documents that should last for years NOT - if you sign contracts or any documents on which your signature is of great importance NO - if you write letters and postcards that are supposed to be a beautiful souvenir za several decades